IMECH-IR  > 高温气体动力学国家重点实验室
Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections
Zhang, C; Wen, P; Yuan YM(袁越明); Fan XJ(范学军); Wen, P (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.; Wen, P (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
2016
Volume86Issue:2016-05-08Pages:1243-1251
ISSN0268-3768
AbstractWith the full use of combustion heat from Fe-O reaction, laser-assisted oxygen cutting (LASOX) is able to cut thick mild steel plates by a defocused laser of medium power (approximately 1 kW). The dynamic behavior of oxygen gas flow, determined by nozzle structure and cutting parameters, is the key factor affecting cut ability and quality. It is significant to understand the method to design a suitable supersonic nozzle and to evaluate its performance. A supersonic minimum length nozzle (MLN) was designed and made specially for LASOX. The configuration (D (exit)/D (critical)) of the designed nozzle was chosen based on two-dimensional isentropic calculation of dynamic gas pressure. The divergent section of the MLN was designed in accordance with the method of characteristics (MOC). Numerical simulation and Schlieren visualization were used to observe and compare the flow behavior of the free jet from the designed MLN nozzle and a commercial supersonic nozzle. The MLN nozzle generates a highly uniform and stable supersonic jet extending a longer distance along the axis of nozzle, which is around 1.4 times longer than that from the commercial supersonic nozzle. Mild steel plates in 20 mm thickness were cut to investigate the effect of cutting parameters on LASOX cut quality of two nozzles. The MLN significantly improved cutting quality due to the better performance of gas flow. The optimal cut quality is related to both oxygen pressure and cutting speed. The oxygen content was measured along the cut surface to explain the difference in cut quality.
KeywordLaser Cutting Supersonic Nozzle Numerical Simulation Flow Visualization
DOI10.1007/s00170-015-8268-7
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000383084300011
WOS KeywordLaser cutting ; Supersonic nozzle ; Numerical simulation ; Flow visualization
WOS Research AreaAutomation & Control Systems ; Engineering
WOS SubjectAutomation & Control Systems ; Engineering, Manufacturing
Funding OrganizationThis work was supported by the Tsinghua University Initiative Scientific Research Program.
DepartmentLHD超声速燃烧
Classification二类
RankingFalse
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59726
Collection高温气体动力学国家重点实验室
Corresponding AuthorWen, P (reprint author), Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China.; Wen, P (reprint author), Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, C,Wen, P,Yuan YM,et al. Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2016,86(2016-05-08):1243-1251.
APA Zhang, C,Wen, P,袁越明,范学军,Wen, P ,&Wen, P .(2016).Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,86(2016-05-08),1243-1251.
MLA Zhang, C,et al."Evaluation and optimal design of supersonic nozzle for laser-assisted oxygen cutting of thick steel sections".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 86.2016-05-08(2016):1243-1251.
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